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Updated: Jun 20, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
Nonlinear polarization coupling and instabilities in single-mode liquid-cored optical fibers
Abstract:
Polarization coupling is demonstrated in a 0.1-m-long length of nitrobenzene-cored weakly birefringent single-mode optical fiber. Self-switching of the launched mode to the orthogonal polarization is observed at peak powers as low as 1 W. A total phase shift of at least 12pi was induced at a launched peak power of approximately 10 W. To our knowledge, this is the largest phase shift observed experimentally in any nonlinear waveguide at such a low power. The low transmission loss of nitrobenzene makes the device highly attractive for a variety of nonlinear switching applications.
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